Lock.



L. TADDEO.

LOOK.

APPLICATION FILED 0GT.26, 1912.

Patented Mar. 30, 1915.

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LUIGI TADDEO, OF CLEVELAND, OHIO.

LOCK.

Application filed October 26, 1912.

To all whom it may concern Be it known that I, LUIGI TAonno, a subject of Victor Emanuel 111, King of Italy, and residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

This invention relates to door locks, the lock case being formed of two semi-cylindrical sections so constructed and secured on a face plate that the lock may be used as a mortise lock and be secured to the door by merely boring an auger hole in the door and entering the chamber therein and securing the face plate to the door, it being understood that the orifice for the key hole is provided for in the door.

This invention consists in the peculiar construction of the bolt operating mechanism which will be hereinafter fully set forth and claimed.

In the drawings, Figure I, is a vertical longitudinal section taken through the casing, illustrating the internal mechanism of the bolt operating means also showing one type of latch mechanism if employed. Fig. 11, is a view in rear elevation of a completed lock, showing the peculiar construction of the bolt casing, Fig. III, is a view in side elevation of a completed lock. Figs. IV and V are plan views of the pivoted tumblers employed in the lock construction.

The peculiar construction of the casing as above mentioned requires that the bolt mechanism be such that maximum strength and perfect operation be attained within a minimum space and that the bolt will have all the advantages of those in which the casing is larger as in the ordinary mortise look at the same time cheapness and simplicity in construction and assemblage being a matter to be desired.

l Vith the above objects in View the construction is as follows: In the bolt mechanism 1 form the chamber 11 cylindrical at the portionlnea-rest the face plate P and Specification of Letters Patent.

Patented Mar. 36 M915.

Serial No. 727,842.

flattened'toward the inner end, the object being to allow the end 12 of the bolt to be heavy or comparatively large in cross section for strength and to properly confine the operating mechanism such as the necessary tumblers l3 and 13 in position. The bolt head 12 is provided with a flat shank 15 formed preferably integral therewith leaving a shoulder 16, and having a slot 17 which allows the bolt to be projected and retracted when the fastening screw 18 is in position, this fastening screw 18 being the screw which secures the two parts of the casing together, it being understood that the casing is formed in two parts. The tumblers 13 and 13 are pivoted to the shank 15 as at 19 and at their forward ends are provided with engaging slots and notches 20, and 21, which engage the fastening screw 18 to lock the bolt either open or closed, a spring 14 being employed for each tumbler to retain them in position and allow them to be disengaged through the medium of a key having a suitable bit and wards to manipulate the ends 23 of the tumblers 13 and 13 so as to first release them from the screw 18 and either project or retract the bolt accordingly as the key is turned.

From the above the simple construction of the bolt mechanism will be seen as will also the security, strength and perfect operation; the entire lock being designed to meet the wants of those requiring an inexpensive but secure construction.

I have illustrated in the drawings, details of construction and assemblages especially adapted to the peculiar style of look but I do not wish to be limited to this specific construction, inasmuch as the same may be greatly changed without departing from this invention.

What I claim is:

A look of the type set forth comprising a casing, a bolt slidably mounted within said casing, means pivotally mounted on said bolt for advancing and retracting said bolt and for locking said bolt in the advanced or retracted position, said means comprising a plurality of tumblers pivotally mounted on said bolt, one end of said tumblers adapted to engage a stationary member in said cas Signed at Cleveland in the county of Guyaing and the other end of said tumblers adapthoga and State of Ohio this 22nd day of ed to be engaged by a key for operating said October 1912.

levers, said key adapted to release and ad- LUIGI TADDEO. Vance or retract said bolt through the Vitnesses: medium of said tumblers, all substantially JOHN J. DONNELLY, as and for the purpose set forth. RENA WEBER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

